Work with Python 11

[simohauml]

Does it work with Python 11?

I noticed some code with latest python async syntax

`

    # @staticmethod
    # @asyncio.coroutine
    # def _async_run_callback(callback, msg):
    #     yield from callback(msg)

    @staticmethod
    async def _async_run_callback(callback, msg):
        await callback(msg)

`

But even that, init error.